Grinding-mill



Y 4 Sheets-Sheet 1. R. MCGULLY.

GRNDING MLL.

(No Mdel.)

Patentd MaLZO, 1883.

QUID.

A 4 sheets-sheet 2.

(No Mdm.)

R. MGGULLY. @BINDING MILL.

Patented Mar. 20, 188.3@

(No Model.) 4 sheets-sheet a.

R. MGGU'LLY. GRINDING MILL.

No, 274.210; A1 fmm=eaManzo,1883.

4. Sheets-Sheet 4.

(No-Hedel.)

R. Nigel-JLM.4 GRINDING MILL.

110.274.210. Patented Mar. 2o, 1884s..

' Usui-T151);N STATI-:s

PATENT Fries.

ROBERT MCGULLY, or PHILADELPHIA, PENNSYLVANIA,

eRlNolNe-MILL.

SPCIFICATON forming part of Letters Patent-No.. 274,210, dated March` 20, 1883; 4 I l Applicaiiondled July 27, 1882. (No model.)

`To all whom it 'may concern Be it known ythat I., ROBERT MCGULLY, a citizen ofthe United States, and a resident of thecity and county of'Philadelphia-,in the State of Pennsylvania, haveinvented certain new and useful Improvements in Grinding-Mills, of which the following is a specification, ref'- erence being had to the accompanying drawings, wherein- Figure l isaplan, partly sectional, cfa grinding-mill embodying my invention. Fig. 2is a l side elevation of' same. Fig. Zris a longitudinal section of' shaftbearing. Fig. 4 is a de-4 Fig. 1Q is a plan of modified arrangement of friction-rollers, and Fig. 11 is a detail section of modification of bearing for roller-frame.

My invention has relation to that class of' grinding-mills in which the grinding-disks are mounted upon separate and relativelyeccentric shafts in such manner that a portion of one grinding-disk overlaps a part of the other disk, said disks` being so arranged that they are closed, or nearly so, from their centers toward the peripheries of their lower parts and opened from their centers toward their top l edges to receive the feed.

Heretofore such mills have been so constructed as to have the grinding-disks pressed or caused to come together by means of appli.

ances which exerted a pressure in the line of or on the shafts upon which said disks were mounted. Such construction not only results eral strain and end-pressure; and the grinding-disks are provided with appliances forexertin g or supporting anydesired pressure required upon the parts of the disks between which the grinding operationtakes place.

To this end my invention consists in the novel construction, combination, and arrangement of parts having especial reference to the provision of two movable frames located back ofthe grinding-disks. Between said disks and frames are placed anti-friction-rollers, said frames forming bearingsfor the driving-shafts, and are provided with mechanism for adjusting the frames toward the grinding-disks to exert any desired pressure upon them, to take up the wear of their grindingsurfaces, and also to vary the grade of grinding ofthe disks.

Referring tothe accompanying drawings, A represents the main frame of the machine; B and B, the grinding-disks, mounted on sepa` rateshaits, C and C', respectively, which are out of line with one another, as shown,so that the disks overlap each other about one-half of" an annular projecting ring, b4, the face of' which.

is inclined, as shown.

D an d Dl are frames having grooved ends d, adapted to rest upon and slide on the ltongue bars 'or blocks E and E', secured to the frame of the mill. Said grooves and tongues may, if desired, be formed as shown in Fig. 5,so as to interlock with each other to permit the frames D and D to serve as connecting-bars for bracing the frame A at its center. and Dl have annular flanges d on their front faces, also annular rings d2, the faces of' which have an inclination corresponding to that of rings b4 of the disks. Said frames are provided with bearings d3 cl3 for the forward ends of the shafts G C. The rings b4 d2 form seats or vways for the anti-friction rollers f f in annular frames F F, whichhave central openings,f'f, and are mounted upon the hubs d* of the disks and of' the frames, as shown in Fig. l.

G G represent nuts having threaded open-` ings g g. Said nuts are ri gidlysecured to the :frames D D by screws or bolts-g g. Into said nuts pass the rods H H', threaded at h l1.. The

The frames l) the disks B and B' back against the frictionend h' of rod H' is seated upon a block secured nut h4 to ai'ord a spring-support for said rod H. 1f desired, said spring` may be dispensed with; or both screw-rods H H' may be provided with a spring.

N N represent collars secured to shafts c and c', immediately toY the rear of frames D and D', as shown in Fig. 1. Said collars hold rollers ff, so that the grinding-surfaces of the disks will be under full control of screw-rods H H', and all irregular movement ot' the grinding-disks to and from each other is avoided'. The rear ends of shafts C C' have their bearings in the pillow-blocks vO 0, secured to frame A, and P P are driving-pulleys for said shafts.

lt will be noticed that the screw-rods H H' are substantially in line with each other and with the overlapping portions of the grindingdisks, and the latter are supported on each side ofthe shafts by the frames D D'. Hence as the screw-rods H H' are turned to cause the frames to move toward each otherapressureis exerted upon the grinding-disks, which is equally distributed over the entire area of said disks. The extent of such pressure may be varied by increasing` or diminishing the adjustment ot the screw-rods H H'. The disks B B' being supported on each side of their respective shafts and rolling on the frictionrollersff, all lateral strain on shafts C C' is avoided. The provision of frames D D' and screw-rods H H' dispenses with the necessity of endpressure on said shafts. Hence power applied to the latter exerts almost its entire force upon the grinding, and a large portion thereof is not used up or wasted in overcoming the friction of the lateral strain and endpressure of the driving-shafts, as has heretofore been the case.

To adjust the disks in relation to each other so that the bottom of their overlapped parts shall be but slightly separated from each other while their upper parts are divergent for the introduction ot' a hopper or the feed, I provide the following instrumentalities, which may or may not be employed, their use depending upon the nature, amount, and size of the material to be ground.

It' desired, the mill may be so constructed that the disks have a movement to and from each other only or they may have alateral and vertical movement in addition thereto. In the latter case the shafts C C' and frames D D' are secured in or placed upon the secondary frames A A', pivoted at a to main frame A. The -frames A' have slotted ends c2 for the passage of set-.screws a3. When the latter are loosened the frames A' may be raised or lowered to skew the shafts C C' from a horizontal plane, causing the lower parts of the disks to come together while their upper parts recede from each other. To provide for a lateral adjustment of the disks and shafts, the tongue-blocks E are slotted at e e for passage of screwse', and are centrally pivoted at e2 to frames A'. The pillow-blocks O are constructed, as shown in Figs. 3 and 4, so that when the set-screws 0 are loosened said blocks have liberty of lateral movement on the plate o2, by reason ot` the screws which connect said blocks Orto plates 0z moving in the slots in said pates, said screws and slots being more plainly shown in I `igs.3 and 4. The plates o" are secured by bolts o3 to frames A'. When the screws, o, are loosened the frames D D' and shafts may be moved laterally, and the blocks E and O turn upon their pivotal connections to adjust themselves to the movement of said frames and shafts, whereupon the set-screws o are tightened up to hold the pillow-blocks in aixed position to maintain such lateraladjustment.

If desired, the friction roller sustaining frames F may be dispensed with and the roll. ers held in place between the disks and frames by means of bearings formed integrally with the disks or with the frames. So, too, instead ofetnploying a wrench or similar implement to eifect adjustment of rods H H' they may he provided with worm-and-gear mechanism for accomplishing `such result.

In Fig. 10 I have shown the friction-rollers f as being formed without journals at their ends, and in rolling contact with each other.

In Fig. 1l I have illustrated a moditied form of bearing for the roller frame F, wherein friction-rollers f4 are interposed between the frame audits bearingF'. Thelatter is formed on the frame D, as shown, and is in the shape -of an annular flange cast integral with or secured to said frame. Such construction removes the weight of the frame F and its roll ers from the driving-shaft, and allows it to fall wholly upon the frame D.

In Figs. 7, 8, and 9 I have indicated a construction ot' an automatic feed for the mill, consisting of a comb or serrated valve, R,'ad justably secured to shaft R' by set-screw r. The shaft R' has its bearings secured to hopper R2, as shown at i" r', and is provided with a slotted arm or crank, R, adjustably secured to another like arm or crank, S, by'means of set-screw s. The crank S is secured to shaft T, the bea-ring tfor which is screwed to the frame of the machine or mill, as shown at t'. Upon the opposite end of shaft T is located a double-end tripper, T', which is in line with a cam, T2, on disk B. As the latter revolves the cam T2 trips each end ot'- the tripper T' to oscillate the shafts T and R', which in turn vibrates the valve R in the hopper-tube. As the valve R so moves, the ore or other ma- IOO IIO

terial to be ground passes between its combs and falls down between the grinding-disks.

By adjusting the height of said valve within the hopper and altering the angle of inclina- V tion or connection of the cranks B4 and S, the

feed is varied as desired. y

The spring L (shown in Fig. 1) may be arranged as illustrated at X, Sheet 1, wherein said springis designed to' be compressed by means of the bolts l' l' and plate l. -By such arrangement any desired spring-pressure may be obtained for the frame D. By screwing up or unloosening the nuts on bolts l' L'the spring is compressed or allowed to eXp-and. Hence a x 5 positive and speedy regulation ot'spring-pressnre is secured. t

What l-claimas my invention is;

1. The combination of grinding-disks B B', their rela tively-eccentric shafts C C', the frames D D', and anti-friction rollers interposed between said disks and frames, substantially as Vshown and described. x

2. In a grinding-mill, the combination of two disks or plates, separate and relativelyeccentric shafts on which said disks are mounted, a t'rame or carriage back of eachl disk, having` a bearing for one of said shafts, and frictionrollers interposed between said frames and disks, substantially as shown and described.

t 4o substantially as shown and described.

5. The combination of disks B B', shafts C C', frames D D', having bearings d3 d3, meollanism for moving said frames toward said disks, and anti-friction rollers interposed be,- tween the disks and frames, substantially as shown and described.

6. The combination of'disks B B', shafts-C C'. friction-rollers f j', frames D D', having bearings d3, and adjusting mechanism interposed between said frames D D' and the mill-frame, substantially as shown and described.

7. The combination of disks B B', shafts C G','frictionrollers ff, the frames D D', having bearings 'd3 d3, and collars N Ng, substantially as shown and described.

V8. The combination of frame A, secondary frames A' A', adapted to be moved vertically, the shafts C C', having bearings ()4 O, the fra-mes D D', having bearings d, and adjust- 3. In a grinding-mill, the combination of ing mechanism H H', friction-rollers ff, and 6o disks B B', substantially as shown and described.

9. In a grinding-mill, the combination of two vgrinding disks or plates, relatively-eccentric shafts, on which said plates are mounted, friction-rollers f f, sliding frames D D', and blocks E E', substantially as shown and described. l j

10. In a grinding-milhthe cmbinatiomwith disks B Bl and shafts C C', the frames D D', having bearings d3 d3 and slotted ends d, and the blocks E E', secured to the frame of the mill, substantially as shown and described.

11. 1n combination with the disks and shafts o f a grinding-mill, the frame D, having slotted ends .d d, shaft-bearing d3, nut G, and adjusting mechanism therefor, substantially as shown and described.

12. In combination with a grinding-disk, the iiange b3, ring or seatb, anti-friction rollers ff, frames D, and adjusting mechanism H, substantially as shown and described.

13. The combination of disks B B', the shafts C C', frames D D', friction-rollers ff, and screw-rods H H', substantially as .shown and described.

14. The combination of disks B B', shafts G C', frictionrollers ff, frames D D'. bearings O, plates o2, screws o, and the adjustable blocks E', substantially as shown and described. 9o

15. In a grinding-mill, the combination o f grindingdisks, friction -rollers, supportingframes therefor, and mechanism for adjusting said frames to and from said' disks, substantially as shown and described.

16. In a grinding-mill, the combination of grinding-disks, friction-rollers, supportingframes therefor, and mechanism for moving said frames to and from said disks and moving them laterally, substantially as shown and described. t

17. In a grinding-mill, the combination of two plates or disks out of center with each other, an automatic feed therefor, adjustable frames, and friction-rollers back ot' said disks, and mechanism for adjusting said frames, substantially as shown and described.

18. The combination, with grinding-disk B, of anti-frictionrollers f f, fra-me D. nut G, screw-rod H, springr L, brace or rod M, plate Z, and bolts Z' l', substantially as shown, and for the purpose set forth.

In testimony whereof I affix mysignatnre in g the presence ot' two witnesses.

1 ROBERT MCGULLY.

`Witnesses i GaAs. F. VAN HORN, S. J. VAN STAvoaaN.

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